I'm officially a Digsby fan:

http://www.digsby.com

This little piece of FREE software is exactly what I was looking for. I wanted a single piece of software that I could use to manage all my social networking, IMs, etc.

Digsby fills that role and more.

Chatting with your Facebook friend is as easy as chatting with a GMail contact. All in one interface.

Additionally, Digsby provides a chat widget (right side of this website) that allows visitors to chat with you in real-time right from your own website! I've been wanting this for a long time and was contemplating writing something myself.

Now I can have my cake and eat it too!